Agent skill

app-store-screenshots

App Store and Google Play screenshot creation with exact platform specs. Covers iOS/Android dimensions, gallery ordering, device mockups, and preview videos. Use for: app store optimization, ASO, app screenshots, app preview, play store listing. Triggers: app store screenshots, aso, app store optimization, play store screenshots, app preview, app listing, ios screenshots, android screenshots, app store images, app mockup, device mockup, app gallery, store listing

View SKILL.md on GitHub Repository
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Forks 46

Install this agent skill to your Project

npx add-skill https://github.com/inference-sh/skills/tree/main/guides/design/app-store-screenshots

SKILL.md

App Store Screenshots

Create app store screenshots and preview videos via inference.sh CLI.

Quick Start

Requires inference.sh CLI (infsh). Install instructions

bash
infsh login

# Generate a device mockup scene
infsh app run falai/flux-dev-lora --input '{
  "prompt": "iPhone 15 Pro showing a clean modern app interface with analytics dashboard, floating at slight angle, soft gradient background, professional product photography, subtle shadow, marketing mockup style",
  "width": 1024,
  "height": 1536
}'

Platform Specifications

Apple App Store (iOS)

Device Dimensions (px) Required
iPhone 6.7" (15 Pro Max) 1290 x 2796 Required
iPhone 6.5" (11 Pro Max) 1284 x 2778 Required
iPhone 5.5" (8 Plus) 1242 x 2208 Optional
iPad Pro 12.9" (6th gen) 2048 x 2732 If iPad app
iPad Pro 11" 1668 x 2388 If iPad app
  • Up to 10 screenshots per localization
  • First 3 screenshots are visible without scrolling (critical)
  • Formats: PNG or JPEG (no alpha/transparency for JPEG)

Google Play Store (Android)

Spec Value
Min dimensions 320 px (any side)
Max dimensions 3840 px (any side)
Aspect ratio 16:9 or 9:16
Max screenshots 8 per device type
Formats PNG or JPEG (24-bit, no alpha)
  • Feature graphic: 1024 x 500 px (required for featuring)
  • Promo video: YouTube URL (optional but recommended)

The First 3 Rule

80% of App Store impressions show only the first 3 screenshots (before the user scrolls). These three must:

  1. Communicate the core value proposition
  2. Show the best feature/outcome
  3. Differentiate from competitors

Screenshot Gallery Order

Position Content Purpose
1 Hero — core value, best feature Stop the scroll, communicate what the app does
2 Key differentiator What makes you unique vs competitors
3 Most popular feature The thing users love most
4 Social proof or outcome Ratings, results, testimonials
5-8 Additional features Supporting features, settings, integrations
9-10 Edge cases Specialized features for niche users

Screenshot Styles

1. Device Frame with Caption

The standard: device mockup showing the app, caption text above/below.

┌──────────────────────────┐
│   "Track Your Habits     │  ← Caption (benefit-focused)
│    Effortlessly"         │
│                          │
│   ┌──────────────────┐   │
│   │                  │   │
│   │   App Screen     │   │  ← Actual app UI in device frame
│   │   Content        │   │
│   │                  │   │
│   │                  │   │
│   └──────────────────┘   │
│                          │
└──────────────────────────┘

2. Full-Bleed UI (No Device Frame)

The app UI fills the entire screenshot. Works for immersive apps.

3. Lifestyle Context

The device shown in a real-world context (person holding phone, on desk, etc.).

4. Feature Highlight with Callouts

UI screenshot with arrows/circles pointing to specific features.

Caption Writing

Rules

  • Max 2 lines of text
  • Benefit-focused, not feature-focused
  • 30pt+ equivalent font size (must be readable in store)

Examples

❌ Feature-focused:
"Push Notification System"
"Calendar View with Filters"
"Data Export Functionality"

✅ Benefit-focused:
"Never Miss a Deadline Again"
"See Your Week at a Glance"
"Share Reports in One Tap"

Generating Screenshots

Hero Screenshot (Position 1)

bash
# Clean device mockup with hero feature
infsh app run falai/flux-dev-lora --input '{
  "prompt": "modern iPhone showing a beautiful fitness tracking app with activity rings and workout summary, device floating at slight angle against soft purple gradient background, professional product shot, clean minimal composition, subtle reflection",
  "width": 1024,
  "height": 1536
}'

Feature Highlight

bash
# Feature callout style
infsh app run bytedance/seedream-4-5 --input '{
  "prompt": "app store screenshot style, iPhone showing a messaging app with AI writing suggestions highlighted, clean white background, subtle UI callout arrows, professional marketing asset, modern design",
  "size": "2K"
}'

Lifestyle Context

bash
# Device in real-world setting
infsh app run falai/flux-dev-lora --input '{
  "prompt": "person holding iPhone showing a cooking recipe app, kitchen background with ingredients, warm natural lighting, over-the-shoulder perspective, lifestyle photography, authentic feeling",
  "width": 1024,
  "height": 1536
}'

Before/After

bash
# Split comparison
infsh app run infsh/stitch-images --input '{
  "images": ["before-screenshot.png", "after-screenshot.png"],
  "direction": "horizontal"
}'

Preview Videos

Apple App Store

Spec Value
Duration 15-30 seconds
Orientation Portrait or landscape (match app)
Audio Optional (loops silently in store)
Format H.264, .mov or .mp4

Google Play

Spec Value
Source YouTube URL
Duration 30s-2min recommended
Orientation Landscape preferred

Preview Video Structure

Segment Duration Content
Hook 0-3s Show the core outcome/wow moment
Feature 1 3-10s Demonstrate top feature in action
Feature 2 10-18s Second key feature
Feature 3 18-25s Third feature or social proof
CTA 25-30s End screen with app icon
bash
# Generate preview video scenes
infsh app run google/veo-3-1-fast --input '{
  "prompt": "smooth screen recording style, finger tapping on a modern mobile app interface, swiping between screens showing charts and data visualizations, clean UI transitions, professional app demo"
}'

Localization

Each language gets its own set of screenshots. Priorities:

Market Localization Level
Primary markets Full: new screenshots + translated captions
Secondary markets Translated captions, same screenshots
Other English defaults

Key localization markets: English, Japanese, Korean, Chinese (Simplified), German, French, Spanish, Portuguese (Brazilian)

A/B Testing (Google Play)

Google Play Console supports store listing experiments:

  • Test different screenshot orders
  • Test with/without device frames
  • Test different captions
  • Test different color schemes
  • Run for 7+ days with 50%+ traffic for significant results

Common Mistakes

Mistake Problem Fix
Settings screen as screenshot Nobody cares about settings Show core value, not infrastructure
Onboarding flow screenshots Shows friction, not value Show the app in-use state
Too much text Unreadable in store Max 2 lines, 30pt+ font
Wrong dimensions Rejected by store Use exact platform specs
All screenshots look the same No reason to scroll Vary composition and content
Feature-focused captions Doesn't communicate benefit "Never Miss a Deadline" > "Push Notifications"
Outdated UI Looks abandoned Update screenshots with each major release
No hero screenshot Weak first impression Position 1 = your best shot

Checklist

  • Correct dimensions for target platform
  • First 3 screenshots communicate core value
  • Captions are benefit-focused, max 2 lines
  • No onboarding or settings screens
  • Preview video is 15-30s with hook in first 3s
  • Localized for top markets
  • Feature graphic (1024x500) for Google Play
  • Screenshots updated for current app version
  • A/B test variant prepared

Related Skills

bash
npx skills add inference-sh/skills@ai-image-generation
npx skills add inference-sh/skills@ai-video-generation
npx skills add inference-sh/skills@image-upscaling
npx skills add inference-sh/skills@prompt-engineering

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